Banerji, Manda, Ferreras, Ignacio, Abdalla, Filipe B., Hewett, Paul, Lahav, Ofer
We present an analysis of the evolution of 8625 Luminous Red Galaxies between z = 0.4 and z = 0.8 in the 2dF and SDSS LRG and QSO (2SLAQ) survey. The LRGs are split into redshift bins and the...
Lahav, Ofer, Kiakotou, Angeliki, Abdalla, Filipe B., Blake, Chris
We study the prospects for detecting neutrino masses from the galaxy angular power spectrum in photometric redshift shells of the Dark Energy Survey (DES) over a volume of 20 (Gpc/h)^3 combined with...
Galaxy Zoo: Reproducing Galaxy Morphologies Via Machine Learning (2009)
Banerji, Manda, Lahav, Ofer, Lintott, Chris J., Abdalla, Filipe B., Schawinski, Kevin, Andreescu, Dan, ...
We present morphological classifications obtained using machine learning for objects in SDSS DR7 that have been classified by Galaxy Zoo into three classes namely spirals, ellipticals and...
Forecasts for Dark Energy Measurements with Future HI Surveys (2009)
Abdalla, Filipe B., Blake, Chris, Rawlings, Steve
We use two independent methods to forecast the dark energy measurements achievable by combining future galaxy redshift surveys based on the radio HI emission line with Cosmic Microwave Background...
The Billion Galaxy Cosmological HI Large Deep Survey (2009)
Myers, Steven T., Abdalla, Filipe B., Blake, Chris, Koopmans, Leon, Lazio, Joseph, Rawlings, Steve
We outline the case for a comprehensive wide and deep survey ultimately targeted at obtaining 21-cm HI line emission spectroscopic observations of more than a billion galaxies to redshift z=1.5 and...
The 'billion galaxy' cosmological HI Large Deep Survey (BiG-CHILDS) (2009)
Myers, Steven T., Abdalla, Filipe B., Blake, Chris, Koopmans, Leon, Lazio, Joseph, Rawlings, Steve
We outline the case for a comprehensive wide and deep survey ultimately targeted at obtaining 21-cm HI line emission spectroscopic observations of more than a billion galaxies to redshift z > 1.5...
The 'billion galaxy' cosmological HI Large Deep Survey (BiG-CHILDS) (2009)
Myers, Steven T., Abdalla, Filipe B., Blake, Chris, Koopmans, Leon, Lazio, Joseph, Rawlings, Steve
We outline the case for a comprehensive wide and deep survey ultimately targeted at obtaining 21-cm HI line emission spectroscopic observations of more than a billion galaxies to redshift z > 1.5...
A Comparison of Six Photometric Redshift Methods Applied to 1.5 Million Luminous Red Galaxies (2008)
Abdalla, Filipe B., Banerji, Manda, Lahav, Ofer, Rashkov, Valery
We present an updated version of MegaZ-LRG (Collister et al.,(2007)) with photometric redshifts derived with the neural network method, ANNz as well as five other publicly available photo-z codes...
Constraining Modified Gravity and Growth with Weak Lensing (2008)
Thomas, Shaun A., Abdalla, Filipe B., Weller, Jochen
The idea that we live in a Universe undergoing a period of acceleration is a strongly held notion in cosmology. As this can, potentially, be explained with a modification to General Relativity we...
Complementarity of Future Dark Energy Probes (2008)
Tang, Jiayu, Abdalla, Filipe B., Weller, Jochen
In recent years a plethora of future surveys have been suggested to constrain the nature of dark energy. In this paper we adapt a binning approach to the equation of state factor ``w'' and discuss...
Banerji, Manda, Abdalla, Filipe B., Lahav, Ofer, Lin, Huan
We conduct a detailed analysis of the photometric redshift requirements for the proposed Dark Energy Survey (DES) using two sets of mock galaxy simulations and an artificial neural network code -...
Host, Ole, Lahav, Ofer, Abdalla, Filipe B., Eitel, Klaus
We present a showcase for deriving bounds on the neutrino masses from laboratory experiments and cosmological observations. We compare the frequentist and Bayesian bounds on the effective electron...
On the origin of the cosmic microwave background anisotropies (2007)
Follop, Ria, Rassat, Anais, Cooray, Asantha, Abdalla, Filipe B.
Suggestions have been made that the microwave background observed by COBE and WMAP and dubbed Cosmic Microwave Background (CMB) may have an origin within our own Galaxy or Earth. To consider the...
Cross-correlation of 2MASS and WMAP3: Implications for the Integrated Sachs-Wolfe effect (2006)
Rassat, Anais, Land, Kate, Lahav, Ofer, Abdalla, Filipe B.
We perform a cross-correlation of the Cosmic Microwave Background (CMB) using the third year Wilkinson Microwave Anisotropy Probe (WMAP) data with the 2 Micron All Sky Survey (2MASS) galaxy map...
The galaxy-galaxy lensing contribution to the cosmic shear two point function (2006)
Bridle, Sarah, Abdalla, Filipe B.
We note that galaxy-galaxy lensing by non-spherical galaxy halos produces a net anti-correlation between the shear of background galaxies and the ellipticity of foreground galaxies. This...